User manual

PTQ-104S Rev2 ♦ Quantum Platform Module Configuration
IEC 60870-5-104 Server for Quantum User Manual
ProSoft Technology, Inc. Page 77 of 195
February 22, 2013
Each of the ASDUs affected by this feature must be assigned a unique priority
index from 0 to 7. Events of the ASDU with a priority of 0 will always be reported
before any others when they are present.
For more information, refer to Event Priority (page 167).
5.6.23 Cyclic Set IV Time
1 to 65535 seconds, or 0 to disable Invalid Bit Monitoring
The parameter should be set to a value significantly greater than the value of the
IV Check Delay Time parameter, multiplied by the value of the IV Fail Count
parameter. Example:
If, IV Check Delay = 3
And, IV Fail Count = 5;
Then set Cyclic Set IV Time significantly greater than 15; preferably some
multiple of this value, like 30, 45, 60, or more.
The Cyclic Set IV Time parameter is one of three parameters needed to establish
a fail-safe data validation system for this protocol implementation. This parameter
is used with the IV Check Delay Time and the IV Fail Count parameters to create
a way to alert the remote IEC-104 Client to situations where data being sent by
the module might be invalid.
Use the Cyclic Set IV Time parameter to set how frequently the Invalid (IV) Bits
assigned to IEC database monitor points (M_xx_xx points) will be set ON. This
means that all the IEC database monitor points configured with IV Bit addresses
greater than zero (0) will have their IV Bit addresses in the module database set
to a value of one (1) in a timed, periodic cycle, based on the number of seconds
entered in Cyclic Set IV Time.